Water or moisture content in soil
Water or moisture content in soil can be expressed as
w = 100 Mw/Ms (1)
w = moisture content (%)
Mw = mass of water in soil (kg, lb)
Ms = dry mass of soil (kg, lb)
Water content can be tested according ASTM D 2216-92 by determining the mass of the wet soil specimen and then drying the soil in an oven 12 - 16 hours at a temperature of 110oC. Values can vary from essentially 0% (near surface rubble, gravel or clean sand) up to 1200% (organic soil like fibrous peat).